JPH07315688A - Apparatus and method for taking up yarn - Google Patents

Abstract

PURPOSE:To provide a yarn taking-up apparatus capable of overcoming dangerous low speed at low vibration level easily with a small diameter and long length spindle and high reliability and durability. CONSTITUTION:An apparatus and method for taking up yarn is provided with a bobbin holder 2 for removably holding bobbins 1a, 1b on the outer peripheral surface. While a bobbin holder support means 25 for supporting removably rotatably the bobbin holder tip 2a of the bobbin holder 2 is provided, a support part 31 of the support means 25 is supported by elastic support means 29a, 29b for changing the support strength of the bobbin holder tip 2a. The yarn is taken up while the bobbin holder support means 25 is not connected to the bobbin holder tip 2a in the rotational frequency of the low speed of the bobbin holder 2 and when the rotational frequency of the bobbin holder 2 is increased to a predetermined rotational frequency exceeding the low speed region, the bobbin holder support means 25 is connected to the tip of the bobbin holder 2 to continue the taking-up.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yarn winding device and a winding device thereof, which have a large number of bobbins to be mounted on a winding bobbin holder and which are excellent in vibration prevention and can be wound at high speed. Regarding taking method. Specifically, in a winding device and a winding method for a yarn equipped with a spindle that overcomes the low critical speed of the bobbin holder rotation speed and has a winding speed range lower than the high critical speed, the low critical speed passage A yarn that enables stable high-speed winding even with a small diameter and long length, by suppressing the vibration during time to a low level and simultaneously increasing the high-speed critical speed to a higher rotational speed range to widen the practical winding range. Winding device and winding method thereof.

[0002]

2. Description of the Related Art Conventionally, in a winding device used for winding a yarn, a winding speed is increased and a winding speed is increased for the purpose of productivity improvement, cost reduction, yarn quality improvement and differentiation. Higher performance is being achieved with a focus on downsizing and increasing the number of bobbins, that is, lengthening bobbin holders.
For example, a total length of 1200 m using a bobbin with an inner diameter of 120 mm
A yarn winding device equipped with an m-class long spindle has achieved a winding speed of 6000 m / min or more.

Further, further improvement of productivity and cost reduction are essential propositions for the textile industry today, and one of the extremely important technical problems is further improvement of spindle performance, that is, higher speed and smaller diameter of the hobbin holder. It is desired to provide a yarn winding device that simultaneously realizes lengthening and lengthening.

By the way, in general, the spindle of a yarn winding device rotates all the way from the high rotation number at the beginning of winding until the end of winding when the yarn is wound and the package diameter becomes large and the rotation number becomes relatively low. It is an essential condition that mechanical damage such as cracks does not occur in several regions, and that stable low vibration capable of winding a thin yarn into a good shape must be realized. For example, when a yarn is wound up to 10 kg at a winding speed of 6000 m / min using a general bobbin, the ratio of the number of rotations at the start of winding to the number of rotations at the end of winding is 3 to 4
Doubles. In addition, in the case of the flexible structure spindle, which is the mainstream of the take-up spindles of today, when the take-up is carried out and the speed is increased from the stop to the take-up speed, the bending vibration causes a comparatively low rotation speed range. It is necessary to overcome the critical speed (hereinafter referred to as low speed critical speed) that occurs in
If the bending vibration is excessively large, not only the critical speed cannot be overcome but also mechanical damage may occur. Since the vibration energy of the critical speed is proportional to the square of the critical speed generation rotational speed, it is desirable to design the rotational speed to be as low as possible in order to easily get over.

On the other hand, a dangerous speed (hereinafter, referred to as a high speed dangerous speed) that occurs in a high speed rotation speed range which is about 4 to 8 times the low speed dangerous speed and becomes a state of excessive vibration must be overcome because vibration energy is large. Is not possible, and the vibration level becomes relatively large even in the vicinity. For this reason, the practical maximum winding speed must be 5 to 15% lower than the critical speed in the high speed range. Therefore, the practical winding speed is
X- in FIG. 3 showing the general relationship between the dangerous speed and the winding speed
This is between W, and the performance of the spindle is being improved under such restrictions.

Here, the critical speed (Nc) m of the spindle
/ Min is generally expressed as Nc〓 (D ² / L ² ) × [= E / ρ] [1], and as described above, there are multiple critical speeds and the number of revolutions range exists between the critical speeds. Is used. In addition, D represents the diameter of the bobbin to be mounted, L represents the entire length of the bobbin, and ρ and E represent the specific gravity of the bobbin holder / spindle shaft and the longitudinal elastic modulus kg / mm ² , respectively. Therefore, in the conventional technique, for example, in the case of increasing the speed of spindles made of the same material and having the same bobbin length, the bobbin diameter and the bobbin holder diameter should be set based on the formula [1] to set the critical speed in the high speed range to a higher rotational speed range. Must be increased in diameter.

However, increasing the diameter of the bobbin inevitably leads to an increase in the cost of the bobbin, and it is difficult to say that high spindle performance is achieved. Since it moves to the rotation speed range, it will be difficult to overcome when increasing speed.

Further, when the diameter of the bobbin is reduced at the same winding speed, the length of the mounting bobbin must be shortened,
Further, when it is attempted to reduce the diameter of the bobbin and increase the length of the mounting bobbin, the winding speed inevitably decreases.
As is clear from the formula [1], the value of the critical speed is 1/2 only when the bobbin diameter is 0.8 times and the bobbin total length is 1.2 times.
As a result, the winding speed will have to be reduced accordingly.

Therefore, the spindle speed is increased,
Smaller diameters and longer lengths are contradictory, and in the prior art, we have attempted to improve the performance by studying the detailed shape of the design, etc., but the conventional method alone reached the limit of technology. Trying to.

As means for overcoming the deadlock of such a technique, for example, Japanese Patent Laid-Open No. 3-293263,
Utilization of a fiber-reinforced composite material as disclosed in JP-A-5-338914 is attempted. In the fiber-reinforced composite material, the value of E / ρ in the above formula [1] is several times larger than that of steel materials widely used as spindle materials,
This physical property is used to improve the performance, but it does not give any solution to the above-mentioned movement of the low speed critical speed to the high rotational speed range due to the increase of the high speed critical speed.

When winding a yarn, a heavy object such as a bobbin or a wound yarn acts as an additional load on the spindle, and the rotating shaft portion supporting the load corresponds to the number of revolutions. High-speed cyclic bending occurs. For example, when the current long spindle is continuously used for one year, the bobbin holder is bent several hundreds of millions of times.
The durability of the fiber-reinforced composite material against such repeated bending is not only evaluated in the short term, but also under the same conditions as the yarn winding device actually used in the production facility. Although long-term confirmation is required at this time, it is hard to say that sufficient confirmation has been obtained at this time.

As described above, the fiber reinforced composite material is not a sufficient and effective means for improving the spindle performance at the present time. Therefore, the performance improvement of the spindle, that is, the speed increase, the diameter reduction, and the length increase are required. At present, no yarn winding device has been found that solves the problems simultaneously in a higher dimension.

[0013]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and pays particular attention to the supporting conditions of the spindle, and by supporting the spindle in accordance with its rotating state, a small diameter and To provide a winding device capable of realizing high-speed winding by easily overcoming low-speed dangerous speed with a low vibration level using a long spindle, and suppressing vibration when passing through such low-speed dangerous speed to a low level, An object of the present invention is to provide a yarn winding method capable of widening a practical winding region by raising the critical speed to a higher rotation speed region.

[0014]

SUMMARY OF THE INVENTION A yarn winding device of the present invention for achieving the above object is a yarn winding device having a bobbin holder for detachably holding a bobbin on an outer peripheral surface.
(A) A bobbin holder supporting means for detachably and rotatably supporting the tip of the bobbin holder is provided near the tip of the bobbin holder.
The supporting portion at the tip of the bobbin holder of the means is supported by elastic supporting means for changing the supporting strength.

The elastic support means is composed of, for example, at least two cylinders that operate perpendicularly to the horizontal plane, and the cylinder axes of the cylinders are arranged in parallel with each other.

Further, the elastic supporting means may be composed of at least two compression springs having different spring constants which operate perpendicularly to the horizontal plane.

Further, it is preferable that a bearing for rotatably supporting the end portion of the bobbin holder is provided on the supporting portion of the bobbin holder supporting means around the extension line of the bobbin holder rotating shaft.

Further, the bobbin holder supporting means preferably has a slide base capable of advancing and retracting the means in the axial direction of the bobbin holder.

Further, it is desirable that a bobbin holder rotation number detecting means for detecting the rotation number of the bobbin holder is connected to the tip end portion of the bobbin holder.

In the above-mentioned means of the present invention, the elastic support means a member which elastically supports the entire bobbin holder supporting means with different strengths. For example, a plurality of anti-vibration having different spring strengths. Examples thereof include rubber, a plurality of hydraulic units used for bicycle suspensions, etc., or a plurality of air springs having different set spring strengths. Further, other elastic supporting means include means such as a coil spring and a dashpot. .

It is desirable that the range of spring strength be as wide as possible, but if it is used as a means for supporting the tip portion of the bobbin holder as in the present invention, it is converted into a value of spring strength Kkg / mm. 0 <K <10000 kg
It may be in the range of / mm. Furthermore, equipment installation space,
If there are restrictions such as cost, 10 <K <2000
Even if it is a degree, it exerts a sufficient effect. The connecting mechanism for connecting the bobbin holder and the supporting portion of the bobbin holder supporting means is not particularly limited, and known means such as coupling, fitting and fastening may be used.

It is possible to change the support strength of the bobbin holder by connecting the support portion of the bobbin holder support means and the tip end portion of the spindle and changing the spring strength of each by the elastic support means. In general,
The critical speed Nc when the bobbin holder given by the above formula [1] is not supported (conventional bobbin holder) and the critical speed Nr when the tip of the bobbin holder according to the present invention is supported.
Has a relationship of Nr = λ × Nc.

Here, λ is a constant proportional to the support strength of the tip of the bobbin holder, and generally takes a value of 1 <λ <2. When the spring strength is 0 (when the bobbin holder support means is not connected to the tip of the bobbin holder), λ = 1, that is, Nr.
= Nc, which is the same state as the conventional spindle that does not support the tip of the spinle.

On the other hand, the value of λ increases as the spring strength increases, and when the spring strength is sufficiently large and λ reaches the maximum value, it can be considered that the bobbin holder tip is fixedly supported. The maximum value of λ varies depending on the outer diameter and length of the supported bobbin holder, but is approximately 1.
It becomes about 2 to 1.8. That is, according to the present invention, the tip end portion of the bobbin holder is supported by the bobbin holder supporting means to change the spring strength, and the support strength of the bobbin holder is changed to compare with the conventional bobbin holder that does not support the tip end of the bobbin holder. High speed critical speed 1.2 ~
It is possible to increase the rotation speed to 1.8 times.

The mode in which the spindle shaft and the bobbin holder shaft can be integrated is a mode in which both members are made of the same member, and a mode in which both members are made of different members and are integrally formed by fastening members such as bolts and nuts. A mode in which both members are integrally configured by shrink fitting or the like is included.

Further, according to the yarn winding method of the present invention which meets the above object, a yarn winding device provided with a bobbin holder for detachably holding the bobbin is provided near the tip of the bobbin holder.
A method for winding a yarn, in which a bobbin holder supporting means having an elastic body whose support strength is changeable is detachably supported to wind the yarn. When the rotation speed is in the low speed range, the bobbin holder supporting means is wound up without being connected to the bobbin holder tip portion, and (b) the bobbin holder supporting means is moved to the predetermined rotation speed beyond the low speed range. It is characterized in that it is connected to the tip of the bobbin holder and continues to be wound up to the high-speed rotation speed.

In this case, it is desirable that the predetermined number of rotations exceeding the low speed range is a rotation speed that exceeds the low speed critical speed and is lower than the high speed critical speed. In the case of a winding device in which the low speed critical speed is 5000 rpm or less and the high speed critical speed is approximately 14000 to 20000 rpm, it is more preferable to switch the supporting method when the number of rotations of 6000 rpm to 7000 rpm is reached.

The reason why the winding method of the present invention is preferable is as follows.

That is, as shown in FIG. 11, the critical speed in the both-end supported state B of the bobbin holder 2 in the high speed range B is higher than the critical speed in the cantilever supported state A in the same area. Winding is realized. The same can be said for the low speed range a. However, if the low speed dangerous speed becomes too high, it becomes impossible to exceed it, and the practical winding range X-W becomes narrower as the critical speed B increases, which is disadvantageous. That is, the lower the critical speeds A and B in the low speed range, the better, and the higher the high speed critical speed, the better. Therefore, the bobbin holder 2 is supported in the cantilever state A at a rotation speed near the low speed critical speed, and is supported in the both-end support state B at a rotation speed near the high speed critical speed, which is the widest practical winding range. Therefore, it can be said that the winding conditions are optimal.

The means for detecting the number of rotations of the bobbin holder is not particularly limited, and for example, a non-contact type such as a photoelectric switch type or proximity switch type rotation sensor, or an inverter for a bobbin holder motor. Known means such as a device for detecting the number of rotations from the output are sufficient.

[0031]

When winding the yarn by the yarn winding device of the present invention according to claim 1, the support spring strength is first set to a small value close to 0 when the bobbin holder is accelerated from the stopped state. deep. This corresponds to the case where the value of λ in the expression [2] is small, and the above-mentioned low speed dangerous speed can be suppressed to a relatively low rotational speed, so that it becomes possible to overcome the dangerous speed at a low vibration level. .

Further, by changing the strength of the support spring to a large value close to that of fixed support in the rotational speed range over the low speed critical speed, the critical speed is higher than the high speed critical speed at a rate corresponding to λ. Since the speed of the bobbin holder is increased to a high speed, it is possible to wind the bobbin holder at a high rotation speed that would prevent it from rotating with a conventional bobbin holder that does not support the bobbin holder tip. .

In the yarn winding method according to the seventh aspect of the present invention, first, when the spindle is accelerated from the stopped state, the supporting device at the tip of the bobbin holder is kept out of contact with the tip of the bobbin holder. This corresponds to the case where the value of λ in the equation [2] is 1, and the above-mentioned low-speed dangerous speed can be suppressed to a relatively low rotational speed, so that it is possible to overcome the dangerous speed at a low vibration level. Become.

Furthermore, by connecting the supporting device for the tip of the bobbin holder to the tip of the bobbin holder at a rotational speed that has surpassed the low-speed critical speed, the critical speed of the rotating bobbin holder is at a rate corresponding to λ (> 1). Since the number of revolutions is increased to a higher speed than the critical speed in the high speed range, the practical winding range becomes wider, and with a conventional bobbin holder that does not support the tip of the bobbin holder, excessive vibration due to the critical speed in the high range causes rotation. It is possible to reliably wind at a high rotation speed that cannot be performed.

[0035]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a yarn winding device and winding method according to the present invention will be specifically described below with reference to the drawings.

Embodiment 1 FIGS. 1 and 2 show a yarn winding device according to a first embodiment of the present invention. FIG. 1 is a cross-sectional view of a yarn winding device having a bobbin inner diameter of 94 mm, a bobbin total length of 1200 mm, and an apparatus bobbin number of 8 threads. Note that in FIG. 1, the bobbin shows only two mountains for easy understanding of the drawing, and the remaining six mountains are omitted.

In the figure, 1a and 1b are yarns Y on the outer circumference.
The bobbin is a tubular bobbin for winding up the bobbin, having an inner diameter of 94 mm, an outer diameter of 110 mm, and a length per one bobbin peak of 150 mm, and is fitted onto the bobbin holder body 4 of the bobbin holder 2. Reference numeral 3 denotes an elastic annular body for attaching and detaching the bobbins 1a and 1b to the bobbin holder body 4, and is mounted slidably in the axial direction of the bobbin holder body 4 via a cylindrical spacer 5 for each bobbin. The bobbin holder body 4 is a tubular body that is long in the axial direction and has a boss 4a at its substantially central portion, and is integrally connected with a spindle shaft 7 having a through hole 6 and a nut 7a. And bearings 8a, 8
It is rotatably supported by an annular support 10 projecting from the housing 9a of the motor 9 into the bobbin holder 2 via b. The motor 9 is fixed on the common frame 36, the motor stator 16 is fixed in the motor housing 9a, and the drive shaft 13 has a through hole 12 inside and is rotated by the bearings 14a, 14b. It is supported freely. A motor rotor 15 is fixed to the outer peripheral portion of the drive shaft 13 and is coaxially connected to the spindle shaft 7 via a right end coupling 11. Therefore, when the drive shaft 13 of the motor 9 is driven by the motor rotor 15 and the motor stator 16, the bobbin holder 2 transmits the drive force to the spindle shaft 7 via the coupling 11 and holds it together. Bobbins 1a and 1b
The bobbin 1a, 1b can be rotated and the yarn Y
Can be wound up.

Reference numeral 17 denotes a bobbin attaching / detaching mechanism for attaching / detaching the bobbins 1a, 1b to / from the bobbin holder main body 4, and includes a piston 18, a compression spring 19, a spring receiver 20,
It is composed of an O-ring 21. The piston 18 is formed integrally with the piston walls 18a and 18b, a rod 18c that connects the two members to each other, and the piston wall 18a, and is formed of a cylindrical portion 18d having a diameter substantially the same as the outer diameter of the spacer 5. . An O-ring 21 is mounted on the outer peripheral surface of the piston wall 18b, and the piston 18 is slidable in the axial direction of the bobbin holder while being kept airtight with the inner peripheral surface of the bobbin holder body 4. In the winding state of the yarn Y,
Stopper 22 attached to the inner peripheral portion of the bobbin holder body 4
The piston 18 is moved to the right by the repulsive force of the spring 19 to the right in the drawing with the base point as the base point, and the elastic ring-shaped body 3 pinched by the cylindrical portion 18d or the spacer 5 is expanded in the radial direction, so that the bobbin 1a and 1b are firmly held by the bobbin holder body 4. Further, when removing the bobbin, compressed air is sent from the right end of the drive shaft 13 into the cylinder chamber 18e through the through hole 12 and the through hole 6, and the entire piston 18 is moved leftward to set the outer diameter of the elastic annular body 3 to the original value. The bobbin can be easily removed by restoring it to the size of. In the present embodiment, the elastic annular body 3, bobbin holder body 4, spacer 5, spindle shaft 7, nut 7a and bobbin attaching / detaching mechanism 17 constitute the bobbin holder 2 for attaching / detaching the bobbins 1a, 1b.

25, which is located at the left end of the bobbin holder tip 2a, is a support means for the bobbin holder 2, and FIG. 1 shows a state in which the support portion 31 of the bobbin holder support means 25 is removed from the bobbin holder tip 2a. The entire bobbin holder supporting means 25 is provided on the common frame 36, and the base 26 is fixed to the common frame 36 by the bolts 27 via the spacers 35a and 35b. Two elastic supports 29a, 29 having different spring constants are provided on the upper portion of the base 26 via a movement guide 28.
b is fixed.

The moving guide 28 includes elastic supporting means 29a, 29b by means of an axial moving means such as a slide base so that the bobbin holder supporting means 25 does not interfere with the attaching and detaching work when the bobbins 1a, 1b are attached and detached. The upper member can move in the axial direction of the bobbin holder 2.

As the elastic supporting means 29a of this embodiment, a commercially available air cylinder using air as an operation source is used.
A hydraulic cylinder using pressure oil as an operation source was used as 9b. The spring strength of each of the elastic supporting means 29a and 29b is 50 kg / m in terms of the spring constant of the spring.
m, 2000 kg / mm was used. Then, both cylinder shafts are vertically arranged at a predetermined interval from each other so that the piston shafts (not shown) of the respective cylinders operate vertically to the horizontal plane. Also, both cylinders 29a, 29b
Is connected to air and pressure oil supply pipes so that either one of the cylinders 29a and 29b or both cylinders can be operated by a switching operation of a switching valve (not shown). The supporting condition of the bobbin holder tip portion 2a can be set by four different types of spring constants in which both cylinders are not operated.

Although the number of elastic supporting means 29a and 29b mounted is two cylinders in this embodiment, it is only one.
The number may be one or a plurality of three or more. The point is that it is only necessary to realize support conditions with different spring constants over the entire range of the rotational speed range of the bobbin holder 2.

Reference numeral 31 is a support portion for connecting and supporting the bobbin holder supporting device 25 and the bobbin holder tip portion 2a, and an annular support 33 fitted to the bobbin holder tip portion 2a, that is, the inner peripheral surface of the piston 18, and a bearing 32. , O-ring 34
a and 34b. Reference numeral 37 denotes a support means main body, which is provided on a rotation guide 30 that can rotate about a center line C that is substantially the center of the elastic support means 29a and 29b. In the present embodiment, the position of the center of rotation of the support 31 is determined by the plurality of spacers 35a, 35b having different thicknesses.
By appropriately selecting and interposing between the common frame 36 and the base 26, the center of rotation of the bobbin holder 2 is matched. However, a suitable known vertical mechanism is provided between the rotation guide 30 and the supporting means main body 37. It may be provided and finely adjusted.
Therefore, in order to connect and support the bobbin holder supporting means 25 to the bobbin holder tip portion 2a, the moving guide 28 is actuated to move the upper portion of the bobbin holder supporting means 25 to the right in the figure, and the center line C of the rotation guide 30 is centered. Then, the support portion 31 may be swung so that the rotation center of the annular support 33 and the rotation center of the piston 18 coincide with each other. In addition, the annular support 3
Reference numeral 3 may be an appropriate known vacuum suction device (not shown), which may be suction-fixed to the opposing bobbin holder tip 2a.

FIG. 2 shows a moving guide 28 and a rotating guide 30.
Is a cross-sectional view of a state in which the left end portion of the bobbin holder 2 is supported by activating and connecting the support portion 31 of the bobbin holder supporting means 25 to the piston 18. In this support state, the annular support 33 of the support portion 31 and the inner peripheral surface of the piston 18 are fitted together. In this state, the O-ring 34a,
When the bobbin holder 2 is rotated, the piston 34 and the annular support 33 are compressed and expanded in the radial direction by frictional force acting to expand and restore the O-ring to its original state.
It prevents the occurrence of slippage between. O-ring 34
It is desirable that a plurality of a and 34b are arranged in the axial direction so that the frictional force is sufficiently exerted. In the present embodiment, the number is two, but three or more may be arranged.

FIG. 3 shows the result of measuring the relationship between the rotation speed N of the bobbin holder 2 and the amplitude δ with respect to the yarn winding device constructed as described above. As a specific configuration of the yarn winding device in this case, the bobbin holder 2 uses chrome molybdenum steel (SCM435) for the bobbin holder body 4, the spindle shaft 7, the annular support 10, and the piston 18. 1200m for the entire bobbin
m. The bobbin holder 2 was directly connected to the 4.7 kw motor 9 via the coupling 11 to form a cantilevered yarn winding machine. Then, from the left end of the bobbin holder 2 (bobbin holder tip portion 2a), the inner diameter is 94 mm, and the outer diameter is 1
Eight 10 mm bobbins 1a and 1b were inserted in series, and the compression spring 19 was actuated to the right in the drawing to be chucked by the bobbin attaching / detaching mechanism 17.

First, when the rotation speed of the bobbin holder at which a critical speed is generated is confirmed by the so-called FFT hitting method in the stationary state, as shown in FIG. 3, the rotation speed of the bobbin holder 2 starts from 0 rpm and the bobbins 1a and 1b start winding. It is the number of rotations. Two low speed critical speeds, Q and R rpm, and one high speed critical speed P, which were required to be overcome before reaching W (17362) rpm, were measured. Table 1 summarizes these data. In the case of this embodiment, the winding speed range is W− which is lower than the high-speed dangerous speed Prpm.
This is the rotation speed range of X.

The measurement is carried out by the bobbin holder supporting means 25.
Is connected to the bobbin holder tip portion 2a of the bobbin holder 2 having the bobbins 1a and 1b mounted thereon and only the elastic supporting means 29a is operated (supporting strength is 50 kg / mm), and only the elastic supporting means 29b is operated (supporting). Strength is 2000
kg / mm), when both 29a and 29b are actuated (support strength is 2050 kg / mm), and a state in which the support portion 31 of the bobbin holder supporting means 25 is removed from the bobbin holder tip portion 2a (bobbin holder tip portion). 2a
In the case of no support (corresponding to a support strength of 0 kg / mm) was carried out at four different support strengths.

[0048]

[Table 1] As shown in Table 1, when the supporting strength is 2000 kg / mm or more (Experiment number 2, 3), compared to the case where the bobbin holder tip 2a is not supported at any critical speed (Experiment number 4), 1. The speed has been increased to about 3 times. For example, comparing the high speed critical speed that is a factor that determines the maximum winding speed, the former is 19200r.
In the latter case, the speed is 14800 rpm, while the speed is pm.

On the other hand, comparing the experimental numbers 2 and 3, the supporting strengths are 2000 kg / mm and 2050 kg / mm.
There is no big difference between
Comparing with 4 and 4, the supporting strength is 50kg / mm and 0kg / m
It can be seen that m has a critical speed at almost the same number of rotations.

Next, the relationship between the spindle speed and the vibration when the yarn was actually wound was measured. The bobbin holder tip portion 2a is supported by the supporting portion 31 of the bobbin holder supporting means 25, and the supporting strength is 50 kg / mm, that is, the experiment number 1 in Table 1.
When the acceleration was started in this state, it was possible to easily overcome the low speed dangerous speed at a low vibration level of 10 μm or less. When the number of rotations of the spindle shaft 7 reached 7,000 rpm, the acceleration was temporarily stopped, and while maintaining a constant speed, the support strength was switched to 2000 kg / mm, that is, the state of the experiment number 2 in Table 1, and then the acceleration was restarted. did. Even if the spindle shaft 7 is accelerated to the rotation speed of 17362 rpm corresponding to the winding speed of 6000 m / min in this supporting state, no excessive vibration due to the dangerous speed in the high speed region is confirmed, and the vibration level is extremely good at 2 to 3 μm. Realized a perfect state. FIG. 4 shows the relationship between the spindle speed and vibration from the spindle stop to 17362 rpm.

After confirming that there is no problem with vibration as described above, the single yarn fineness is 5 denier and the total number of filaments is 15
The winding of polyester multifilaments in a book was started. The relationship between the spindle speed and the vibration during winding is almost the same as in Fig. 4, and it is possible to confirm the excellent characteristics without the occurrence of vibration that may be dangerous during winding. did it. Finally, at a high-speed winding speed of 6000 m / min, bobbin inner diameter 94 mm / bobbin outer diameter 110 mm
It was possible to wind up 8 kg of 10 kg yarns on the small diameter bobbin.

Comparative Example 1 Next, for comparison, the spindle was accelerated with the supporting strength set to 50 kg / mm. The low-speed critical speed was able to be overcome at a low vibration level of 10 μm or less in the vibration value as in the above-described embodiment, but the low-speed critical speed was 13 near the high-speed critical speed.
Excessive vibration exceeding 30 μm occurred at around 500 rpm (4665 m / min), and high-speed winding at a winding speed of 6000 m / min was not achieved. The relationship between the rotational speed of the spindle shaft 7 and the vibration in this case is shown in FIG. A similar result was obtained in the rotation test with the spindle support device corresponding to the conventional spindle of the bobbin holder supporting means 25 removed from the bobbin holder tip portion 2a.
It was not possible to carry out winding.

Comparative Example 2 Further, when the supporting strength was set to 2000 kg / mm and the rotation was started, 4200 rp from the spindle stopped state.
When the speed was increased to m, excessive vibration with a vibration value exceeding 30 μm occurred and it was not possible to overcome the low speed dangerous speed. This increases the support strength of the bobbin holder tip 2a to 200
This is because by setting a large value of 0 kg / mm, the low speed dangerous speed was increased to the high speed rotation speed, the vibration energy increased, and excessive vibration occurred. The relationship between the spindle rotation speed and the vibration in this case is shown in FIG. The support strength is 205
Similar results were obtained in the rotation test with 0 kg / mm.

Embodiment 2 FIG. 7 shows a second embodiment of the present invention, and is a cross-sectional view of a yarn winding device having a mounting bobbin inner diameter of 94 mm and a bobbin total length of 900 mm and taking up six threads. In addition, in FIG. 7, only two peaks are shown, and the remaining four that are repeated in the axial direction are shown.
Mountains are omitted. In the yarn winding device of this embodiment,
The bobbin holder main body 4 made of a steel material (chromium molybdenum steel SCM435) has the bobbins 1a and 1b and the elastic annular body 3.
Of the bobbin holder 40 that is detachably held on the outer peripheral surface by the action of the
It is equipped with a so-called integral spindle composed of a spindle shaft portion 37 supported via 4a and 14b.

Reference numeral 17 denotes a bobbin attaching / detaching means having the same mechanism as that of the first embodiment. The bobbin holder main body 4 is provided with a through hole 42 for passing a pressurized fluid. Again 25
Is a bobbin holder supporting means having the same structure as in the first embodiment, and FIG. 7 shows a state in which the supporting portion 31 of the bobbin holder supporting means 25 is connected to and supported by the bobbin holder tip portion 2a.

With respect to the yarn winding device constructed as described above, the relationship between the spindle rotation speed and the vibration was measured.

First, the rotational speed at which a critical speed is generated was confirmed by the FFT impact method in a stationary state. With the integrated spindle as in this embodiment, one low speed critical speed Q and one high speed dangerous rotation speed P shown in FIG. 3 are measured.
The results are shown in Table 2.

The measurement is carried out when the supporting portion 31 of the bobbin holder supporting means 25 is connected to the bobbin holder tip portion 2a and only the elastic supporting means 29a is operated (the supporting strength is 50 kg / m).
m), when only the elastic support means 29b is operated (support strength is 2000 kg / mm), when both 29a and 29b are operated (support strength is 2050 kg / mm), and the bobbin holder support means 25. Of the support portion 31 of the bobbin holder distal end portion 2a (support strength is 0 kg / m when the bobbin holder distal end portion 2a is not supported).
(corresponding to m).

[0059]

[Table 2] As shown in Table 2, as the supporting strength increases, both the low speed critical speed and the high speed critical speed can be increased to the high speed range, but the supporting strength is 2000 kg / mm and 2050.
There was no big difference between kg / mm (Experimental numbers 2 and 3), and it was confirmed that the critical speed occurs at the same rotational speed at the bearing strengths of 50 kg / mm and 0 kg / mm (Experimental numbers 5 and 6). Comparison). On the other hand, a support strength of 200
When the speed is set to 0 kg / mm or more (Experiment number 1 and 4), the critical speed generation speed is about 1.8 times at the low critical speed and at the high critical speed as compared with the case where the tip of the bobbin holder is not supported (Experiment number 8). The speed has been increased to about 1.4 times.

Next, the relationship between the spindle speed and the vibration when the yarn was actually wound was measured. The bobbin holder tip 2a is supported by the bobbin holder supporting means 25 to have a supporting strength of 50.
kg / mm, that is, when the vehicle was supported in the state of the experiment number 5 in Table 2 and the acceleration was started, the low-speed critical speed was set to the vibration value of 15 μm.
I was able to overcome it with a relatively low vibration level. When the number of spindle revolutions reached 5500 rpm, the acceleration was temporarily stopped, and while maintaining a constant speed, the supporting strength was changed to 2000 kg / mm, that is, the state of the experiment number 6 in Table 2, and then the acceleration was restarted. In this supported state, the spindle rotates at a speed of 1 corresponding to a winding speed of 6000 m / min.
Even when the speed was increased to 7362 rpm, no excessive vibration due to the dangerous speed in the high speed region was confirmed, and the vibration level was 5 μm, which was a good state. 17362r from spindle stop
FIG. 8 shows the relationship between the spindle speed up to pm and vibration.

After confirming that there is no problem with vibration as described above, the single yarn fineness is 5 denier and the total filament is 1.
The winding of 5 polyester multifilaments was started. The relationship between the spindle rotation speed and the vibration during winding also showed a good value almost the same as in Fig. 8, and it was possible to confirm the excellent characteristics without the occurrence of vibration that would be dangerous during winding. . Finally, by high-speed winding at a winding speed of 6000 m / min, 10 kg of 6 yarns could be wound on a small bobbin having a bobbin inner diameter of 94 mm / bobbin outer diameter of 110 mm.

Comparative Example 3 For comparison, the spindle was accelerated with the supporting strength set to 50 kg / mm. The low-speed critical speed was able to overcome the vibration value of 15 μm or less as in the case of the above-described Example 2, but excessive vibration exceeding 30 μm occurred at around 12500 rpm (4320 m / min) near the high-speed critical speed, and the winding speed was 6000 m. It was not possible to realize high-speed winding / minute. FIG. 9 shows the relationship between the spindle speed and the vibration in this case.

Comparative Example 4 Further, when the support strength was set to 2000 kg / mm and the rotation was started, the vibration level was high immediately after the speed was raised and the vibration value exceeded 30 μm at the time when the rotation speed was 2800 rpm, and the speed exceeded the low speed critical speed. I couldn't do that. Excessive vibration occurred even though the rotation speed of the low-speed dangerous speed was relatively low, because the bobbin holder tip 2a was strongly supported with a supporting strength of 2000 kg / mm, so that the rotational energy of the spindle could not be dissipated and the vibration energy It became because it became. FIG. 10 shows the relationship between the spindle rotation speed and the vibration in this case.

Embodiment 3 Next, the winding method of the present invention will be described with reference to FIG.

In the winding device of the first embodiment, first, as a first step, the state of the low speed range of FIG. 11, that is, the bobbin holder tip portion 2a of FIG. 1 described above is supported by the supporting portion 31 of the bobbin holder supporting means 25. When the acceleration was started in the absence state (the state of the experiment number 4 in Table 1), it was possible to easily get over the low speed critical velocity at a low vibration level of 10 μm or less.

Next, in the second step, the rotation speed of the spindle shaft 7 is detected using a proximity switch type rotation sensor as the bobbin holder rotation speed detection means, and the rotation speed is 70%.
When the speed reached 00 rpm, the acceleration was temporarily stopped, and the supporting strength was switched to 2000 kg / mm, that is, the state of the experiment number 2 in Table 1 while maintaining a constant speed, and then the acceleration was restarted. In this supporting state, the spindle shaft 7 is wound at a winding speed of 60.
Rotational speed 17362rp in the high speed range equivalent to 00m / min
Even when the speed was increased to m, no excessive vibration due to the dangerous speed in the high speed range was confirmed at all, just as in Example 1, and the vibration level was 2 to 3 μm, which was extremely good, as in Example 1. Therefore, in this Example 2, as compared with the winding method of Example 1, as shown in the experiment number 4 of Table 1, the practical rotational speed in the low speed region corresponds to the amount that the bobbin holder is not supported, that is, 1350 rpm. Since it is about low, the practical winding speed X-W has the effect of expanding by this amount. Example 4 Next, using the winding device of Example 2, the same winding method of the present invention as in Example 3 was implemented.

First, as the first step, when the bobbin holder tip portion 2a shown in FIG. 7 is not supported by the bobbin holder supporting means 25, that is, in the state of the experimental number 8 in Table 2, the acceleration is started as the first step. It was possible to overcome the low speed dangerous speed at a relatively low vibration level of about 12 μm.

Next, as a second step, a proximity switch type rotation sensor is used as a rotation speed detecting means of the bobbin holder main body 4, and the rotation speed of the bobbin holder main body 4 is 5500 rp.
When the speed reaches m, the acceleration is temporarily stopped, and while maintaining a constant speed, the supporting strength is switched to 2000 kg / mm, that is, the state of the experiment number 6 in Table 2, then the acceleration is restarted and the rotation in the high-speed range is performed. The speed was increased to 17362 rpm. In this case as well, just as in Example 3, no excessive vibration due to the dangerous speed in the high speed region was confirmed, and the vibration level was 5 μm, which was an extremely good state, as in Example 2. This Example 4
In comparison with the winding method of Example 2, the practical rotational speed in the low speed range was increased by about 350 rpm as the bobbin holder body 4 was not supported.

[0069]

As described above, the yarn winding device of the present invention according to claims 1 to 6 has the above-mentioned structure and operation, and therefore can exhibit the following excellent effects.

By supporting the bobbin holder at its tip end according to the rotating state, the winding speed can be increased to a higher speed side even when the bobbin to be mounted has a small diameter and a long length. Therefore, not only it is possible to easily overcome the low speed dangerous speed at a low vibration level with a small diameter and long spindle, but also the practical winding speed range is expanded by the amount that the winding speed is increased to the high speed side.
High-speed winding of a yarn in multiple windings with a small-diameter bobbin, which could not be realized by the conventional technology, becomes possible. Since the apparatus of the present invention can cope with the conventional spindle only by attaching the spindle support device, the performance of the existing production facility can be improved with a small modification cost.

According to the yarn winding method of the present invention as defined in claims 7 to 8, the practical winding speed of the bobbin holder is maximized only by adding bobbin holder rotation speed detecting means to the winding device of claim 1. It is possible to detect the rotation speed period when the bobbin holder supporting method is changed. By switching the method of supporting the tip of the bobbin holder at the time when a predetermined number of rotations is reached in advance, the winding speed can be increased to a higher speed side even when the mounting bobbin has a small diameter and a long length. it can. Therefore, of course, vibration at the time of passing a low speed dangerous speed can be suppressed to a low level, and in addition, by raising the high speed dangerous speed to a higher rotational speed region, the practical winding rotational speed region is expanded by this amount, This enables high-speed winding of yarn in multiple windings with a small-diameter bobbin, which was not possible with technology.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a yarn winding device according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view showing a state in which a spindle and a spindle support device are connected to each other in the apparatus shown in FIG.

FIG. 3 is a diagram showing the relationship between the rotational speed of a spindle and the vibration in which a practical winding speed range is set at a rotational speed over a low-speed critical speed and lower than a high-speed critical speed.

FIG. 4 is a view showing a spindle supporting strength of 50 kg / mm by connecting a spindle and a bobbin holder supporting means in the apparatus of FIG.
After supporting the low critical speed, set the support strength to 20.
It is a relationship diagram of the rotation speed and the vibration of a spindle at the time of carrying out high speed winding by changing to 00 kg / mm.

5 is a view showing a spindle supporting strength of 50 kg / mm by connecting a spindle and a bobbin holder supporting means in the apparatus of FIG.
It is a relationship diagram of a spindle rotation speed and a vibration at the time of carrying out a rotation test set to.

FIG. 6 is a view showing a spindle support strength of 2000 kg / m when the spindle and the spindle support device are connected to each other in the apparatus of FIG.
It is a relationship diagram of a spindle rotation speed and a vibration at the time of setting to m and performing a rotation test.

FIG. 7 is a vertical sectional view of a yarn winding device according to a second embodiment of the present invention.

FIG. 8 is a view showing the apparatus of FIG. 7 in which the spindle and bobbin holder supporting means are connected to each other and the spindle supporting strength is 50 kg / mm.
After supporting the low critical speed, set the support strength to 20.
It is a relationship diagram of the rotation speed of a spindle at the time of changing to 00 kg / mm, and performing high-speed winding.

9 is a view showing the apparatus of FIG. 7 in which the spindle and bobbin holder supporting means are connected to each other and the spindle supporting strength is 50 kg / mm.
It is a relationship diagram of a spindle rotation speed and a vibration at the time of carrying out a rotation test set to.

10 is a view showing a spindle supporting strength of 2000 kg when the spindle and bobbin holder supporting means are connected in the apparatus of FIG.
It is a relationship diagram of a spindle rotation speed and a vibration at the time of carrying out a rotation test set to / mm.

FIG. 11 is a diagram showing the relationship between spindle rotation speed and vibration in the yarn winding method of the present invention.

[Explanation of symbols]

 1a, 1b bobbin 2 bobbin holder 2a bobbin holder tip 3 elastic annular body 4 bobbin holder main body 7 spindle shaft 7a nut 8a, 8b, 32 frame 9 support 10, 33 annular support 11 coupling 13 drive shaft 14a, 14b bearing 15 motor rotor 16 motor stator 17 bobbin attaching / detaching mechanism 18 pistons 18a, 18b piston wall 18c rod 18d cylindrical portion 18e cylinder chamber 19 compression spring 20 spring receiver 21, 34a O-ring 22 stopper 25 bobbin holder supporting means 26 base 27 bolt 28 moving guide 29a elastic support Air cylinder 29b as means 30 Hydraulic cylinder 30 as elastic support means 30 Rotation guide 31 Support part 36 Common frame 37 Support means body 40 Bobbin holder part 41 Spin Dollar shaft 42 Through hole

Claims (9)

[Claims] 1. A yarn winding device including a bobbin holder that detachably holds a bobbin on an outer peripheral surface, wherein: (a)
A bobbin holder support means for detachably and rotatably supporting the tip end portion of the bobbin holder is provided near the tip end portion of the bobbin holder, and (b) the bobbin holder tip end support portion of the means is supported. A yarn winding device, which is supported by elastic supporting means for changing strength. 2. The yarn winding device according to claim 1, wherein the elastic supporting means comprises at least two fluid cylinders that operate perpendicularly to a horizontal plane. 3. The yarn winding device according to claim 2, wherein the cylinder axes of the at least two fluid cylinders are arranged parallel to each other. 4. The yarn winding device according to claim 1, wherein the elastic supporting means is composed of at least two compression springs having different spring constants which operate perpendicularly to a horizontal plane. 5. A bobbin holder supporting means is provided with a bearing for rotatably supporting an end portion of the bobbin holder around the extension line of the rotation axis of the bobbin holder in the supporting portion of the bobbin holder supporting means. The yarn winding device described in. 6. The yarn winding device according to claim 1, wherein the bobbin holder supporting means has a slide base capable of advancing and retracting the bobbin holder supporting means in the axial direction of the bobbin holder. 7. The yarn winding device according to claim 1, further comprising bobbin holder rotation speed detection means for detecting the rotation speed of the bobbin holder. 8. A bobbin holder supporting means for detachably holding a bobbin is detachably supported by a bobbin holder supporting means having an elastic body whose support strength is variable, in the vicinity of the tip of the bobbin holder. And (b) when winding the yarn, the bobbin holder supporting means is attached to the tip of the bobbin holder when the number of rotations of the spindle is low. Winding without connection, (b) When the speed is increased to a predetermined number of revolutions beyond the low speed range, the bobbin holder supporting means is connected to the tip of the bobbin holder to continue the winding up to the high speed range. A method for winding a yarn, which is characterized in that 9. The winding method for a yarn according to claim 8, wherein the predetermined number of revolutions exceeding the low speed range is a number of revolutions exceeding the low speed critical speed and lower than the high speed critical speed.